/* ============================================================
   3dExosomes.com — Shared Stylesheet
   "Scientific Monograph" aesthetic
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,300;1,8..60,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Color Palette */
  --navy:         #0a1628;
  --navy-mid:     #0f2044;
  --navy-light:   #1a3260;
  --white:        #ffffff;
  --gold:         #c9a84c;
  --gold-light:   #e2c47a;
  --gold-dim:     #8a6f2e;
  --grey-light:   #f4f5f7;
  --grey-mid:     #e8eaed;
  --grey-border:  #d1d5db;
  --grey-text:    #6b7280;
  --text-primary: #111827;
  --text-body:    #374151;
  --text-muted:   #9ca3af;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body:    'Source Serif 4', Georgia, serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Spacing Scale */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  4rem;
  --space-4xl:  6rem;
  --space-5xl:  8rem;

  /* Layout */
  --content-max:  1100px;
  --content-wide: 1280px;
  --nav-height:   72px;

  /* Transitions */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:    cubic-bezier(0.4, 0, 1, 1);
  --duration:   0.25s;
  --duration-lg: 0.45s;

  /* Borders */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --rule-gold:  1px solid var(--gold);
  --rule-dim:   1px solid var(--grey-border);
  --rule-navy:  1px solid var(--navy-light);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-body);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--navy-light);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--duration) var(--ease-out);
}

a:hover {
  color: var(--gold-dim);
}

ul, ol {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.35rem;
}

/* ============================================================
   TYPOGRAPHY SYSTEM
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.25;
  color: var(--text-primary);
  font-weight: 600;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; font-weight: 600; }
h5 { font-size: 1rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }

p { margin-bottom: 1.25rem; }
p:last-child { margin-bottom: 0; }

.display-serif {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-md);
  display: block;
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-xl);
  padding-right: var(--space-xl);
}

.container--wide {
  max-width: var(--content-wide);
}

.section {
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
}

.section--sm {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.section--dark {
  background: var(--navy);
  color: var(--white);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--white);
}

.section--dark p,
.section--dark li {
  color: rgba(255,255,255,0.82);
}

.section--grey {
  background: var(--grey-light);
}

.section--mid {
  background: var(--navy-mid);
  color: var(--white);
}

.section--mid h2,
.section--mid h3 {
  color: var(--white);
}

.section--mid p {
  color: rgba(255,255,255,0.8);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  border-bottom: 1px solid rgba(201, 168, 76, 0.25);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 0.1em;
}

.nav-logo span {
  color: var(--gold);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 400;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: color var(--duration) var(--ease-out);
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  border-bottom-color: var(--gold);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown > a::after {
  content: ' ▾';
  font-size: 0.65em;
  opacity: 0.6;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: -1rem;
  background: var(--navy-mid);
  border: 1px solid rgba(201,168,76,0.2);
  border-radius: var(--radius-md);
  min-width: 200px;
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out),
              visibility var(--duration);
  list-style: none;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 0.5rem 1rem;
  border-bottom: none;
  font-size: 0.825rem;
}

.nav-cta {
  font-family: var(--font-body);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--navy) !important;
  background: var(--gold);
  border-radius: var(--radius-sm);
  padding: 0.45rem 1.1rem !important;
  text-decoration: none;
  border-bottom: none !important;
  transition: background var(--duration) var(--ease-out), color var(--duration) !important;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--gold-light) !important;
  color: var(--navy) !important;
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--white);
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--duration) var(--ease-out), opacity var(--duration);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: var(--navy);
  padding: var(--space-5xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(201,168,76,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 80% at 10% 80%, rgba(26,50,96,0.8) 0%, transparent 50%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.4;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid rgba(201,168,76,0.35);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.75rem;
  margin-bottom: var(--space-lg);
}

.hero__headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  line-height: 1.15;
  color: var(--white);
  margin-bottom: var(--space-lg);
}

.hero__headline em {
  font-style: italic;
  color: var(--gold-light);
}

.hero__subhead {
  font-family: var(--font-body);
  font-size: 1.15rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.75);
  margin-bottom: var(--space-2xl);
  max-width: 640px;
  font-weight: 300;
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  align-items: center;
}

/* Page hero (inner pages) */
.page-hero {
  background: var(--navy);
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid rgba(201,168,76,0.25);
  position: relative;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.35;
}

.page-hero__breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: var(--space-sm);
}

.page-hero__breadcrumb a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
}

.page-hero__breadcrumb a:hover {
  color: var(--gold);
}

.page-hero__breadcrumb span {
  margin: 0 0.5em;
  opacity: 0.4;
}

.page-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  color: var(--white);
  margin-bottom: var(--space-sm);
  max-width: 720px;
}

.page-hero__desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.65);
  max-width: 600px;
  font-weight: 300;
  margin-top: var(--space-sm);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  padding: 0.7rem 1.6rem;
  transition: background var(--duration) var(--ease-out),
              color var(--duration),
              border-color var(--duration),
              transform 0.15s var(--ease-out),
              box-shadow 0.15s var(--ease-out);
  cursor: pointer;
  border: 2px solid transparent;
  letter-spacing: 0.01em;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}

.btn--primary:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  color: var(--navy);
  box-shadow: 0 4px 24px rgba(201,168,76,0.35);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.4);
}

.btn--outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.06);
  color: var(--white);
}

.btn--outline-gold {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold);
}

.btn--outline-gold:hover {
  background: var(--gold);
  color: var(--navy);
}

.btn--outline-navy {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}

.btn--outline-navy:hover {
  background: var(--navy);
  color: var(--white);
}

.btn--sm {
  padding: 0.45rem 1rem;
  font-size: 0.825rem;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--white);
  border: 1px solid var(--grey-mid);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out),
              transform var(--duration-lg) var(--ease-out);
}

.card:hover {
  border-color: var(--gold-dim);
  box-shadow: 0 8px 40px rgba(10,22,40,0.1);
  transform: translateY(-2px);
}

.card--dark {
  background: var(--navy-mid);
  border-color: var(--navy-light);
  color: var(--white);
}

.card--dark h3 {
  color: var(--white);
}

.card--dark p {
  color: rgba(255,255,255,0.75);
}

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(201,168,76,0.1);
  border: 1px solid rgba(201,168,76,0.2);
}

.card__icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--gold);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card h3 {
  margin-bottom: var(--space-sm);
}

.card__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-sm);
  display: block;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  margin-top: var(--space-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--navy-light);
  text-decoration: none;
  border-bottom: 1px solid var(--grey-border);
  padding-bottom: 1px;
  transition: color var(--duration), border-color var(--duration);
}

.card__link:hover {
  color: var(--gold-dim);
  border-color: var(--gold);
}

.card__link::after {
  content: '→';
  transition: transform var(--duration) var(--ease-out);
}

.card__link:hover::after {
  transform: translateX(3px);
}

/* ============================================================
   PILLAR SECTION (3 pillars)
   ============================================================ */
.pillars-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.pillars-header h2 {
  margin-bottom: var(--space-sm);
}

.pillars-header p {
  max-width: 560px;
  margin: 0 auto;
  color: var(--grey-text);
}

.pillar-number {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: block;
  opacity: 0.8;
}

/* ============================================================
   AOS SYSTEM SECTION
   ============================================================ */
.aos-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid rgba(201,168,76,0.3);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.aos-vial {
  padding: var(--space-2xl);
  border-right: 1px solid rgba(201,168,76,0.2);
}

.aos-vial:last-child {
  border-right: none;
}

.aos-vial__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-md);
}

.aos-vial h3 {
  color: var(--white);
  margin-bottom: var(--space-md);
}

.aos-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.aos-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  color: rgba(255,255,255,0.78);
  font-size: 0.925rem;
  margin-bottom: 0.6rem;
  line-height: 1.5;
}

.aos-list li::before {
  content: '—';
  color: var(--gold);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

/* ============================================================
   PRACTITIONERS CTA
   ============================================================ */
.practitioner-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.practitioner-bar__text h2 {
  margin-bottom: var(--space-sm);
}

.practitioner-bar__text p {
  max-width: 520px;
  color: rgba(255,255,255,0.72);
  margin: 0;
}

/* ============================================================
   FIND A PROVIDER CTA BANNER
   ============================================================ */
.provider-banner {
  text-align: center;
  padding: var(--space-4xl) 0;
  background: var(--navy);
  position: relative;
  overflow: hidden;
}

.provider-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 50%, rgba(201,168,76,0.06) 0%, transparent 70%);
}

.provider-banner__inner {
  position: relative;
  z-index: 1;
}

.provider-banner h2 {
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.provider-banner p {
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--space-xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   FAQ ACCORDION (CSS-only via details/summary)
   ============================================================ */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--grey-mid);
}

.faq-item:first-child {
  border-top: 1px solid var(--grey-mid);
}

.faq-item summary {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 1.1rem 2rem 1.1rem 0;
  cursor: pointer;
  list-style: none;
  position: relative;
  user-select: none;
  -webkit-user-select: none;
}

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::marker { display: none; }

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--gold);
  transition: transform var(--duration) var(--ease-out);
  line-height: 1;
}

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item[open] summary {
  color: var(--navy);
}

.faq-answer {
  padding: 0 0 1.25rem;
  color: var(--text-body);
  font-size: 0.975rem;
  line-height: 1.75;
  max-width: 680px;
}

/* ============================================================
   TABLES
   ============================================================ */
.table-wrapper {
  overflow-x: auto;
  margin: var(--space-xl) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--grey-mid);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--white);
}

thead {
  background: var(--navy);
  color: var(--white);
}

thead th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.85rem 1rem;
  text-align: left;
  color: var(--white);
}

thead th:first-child {
  border-radius: var(--radius-md) 0 0 0;
}

thead th:last-child {
  border-radius: 0 var(--radius-md) 0 0;
}

tbody tr {
  border-bottom: 1px solid var(--grey-mid);
  transition: background var(--duration);
}

tbody tr:last-child {
  border-bottom: none;
}

tbody tr:nth-child(even) {
  background: var(--grey-light);
}

tbody tr:hover {
  background: rgba(201,168,76,0.05);
}

td {
  padding: 0.75rem 1rem;
  vertical-align: top;
  line-height: 1.5;
}

td:first-child {
  font-weight: 600;
  color: var(--text-primary);
}

.td-check {
  color: #16a34a;
  font-size: 1.1rem;
}

.td-cross {
  color: #dc2626;
  font-size: 1.1rem;
}

.td-warn {
  color: #d97706;
  font-size: 1.1rem;
}

/* ============================================================
   CONTENT LAYOUT (inner pages)
   ============================================================ */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-3xl);
  align-items: start;
}

.content-body h2 {
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--grey-mid);
}

.content-body h2:first-child {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}

.content-body h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

/* Sticky sidebar */
.content-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
}

.toc {
  background: var(--grey-light);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-lg);
}

.toc__title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: var(--space-md);
  display: block;
}

.toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc__list li {
  margin-bottom: 0.4rem;
}

.toc__list a {
  font-size: 0.85rem;
  color: var(--text-body);
  text-decoration: none;
  line-height: 1.4;
  transition: color var(--duration);
}

.toc__list a:hover {
  color: var(--navy);
}

.toc__list--sub {
  padding-left: 0.75rem;
  margin-top: 0.25rem;
  border-left: 1px solid var(--grey-border);
}

.toc__list--sub a {
  font-size: 0.8rem;
  color: var(--grey-text);
}

/* Pull quote / highlight box */
.pullquote {
  border-left: 4px solid var(--gold);
  background: rgba(201,168,76,0.05);
  padding: 1.25rem 1.5rem;
  margin: var(--space-xl) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.pullquote p {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--navy);
  margin: 0;
  line-height: 1.65;
}

/* References box */
.references-box {
  background: var(--grey-light);
  border: 1px solid var(--grey-mid);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-top: var(--space-2xl);
}

.references-box h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: var(--space-md);
}

.references-box ol {
  padding-left: 1.25rem;
  margin: 0;
}

.references-box li {
  font-size: 0.8rem;
  color: var(--grey-text);
  line-height: 1.6;
  margin-bottom: 0.5rem;
  font-family: var(--font-body);
}

/* Next page CTA */
.page-cta {
  background: var(--navy);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  margin-top: var(--space-3xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.page-cta__text h3 {
  color: var(--white);
  margin-bottom: var(--space-xs);
}

.page-cta__text p {
  color: rgba(255,255,255,0.65);
  margin: 0;
  font-size: 0.9rem;
}

.page-cta__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* Data callout */
.data-callout {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
  text-align: center;
}

.data-callout__stat {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.data-callout__label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.65);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.stats-row {
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
  margin: var(--space-xl) 0;
}

/* Science callout box */
.science-box {
  border: 1px solid var(--navy-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: var(--space-xl) 0;
}

.science-box__header {
  background: var(--navy);
  padding: 0.6rem var(--space-lg);
}

.science-box__header span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

.science-box__body {
  padding: var(--space-lg);
  background: var(--grey-light);
}

.science-box__body p {
  margin-bottom: 0.75rem;
  font-size: 0.925rem;
  line-height: 1.7;
}

.science-box__body p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   FORMS
   ============================================================ */
.form-section {
  max-width: 680px;
  margin: 0 auto;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: var(--space-md);
}

.form-field--full {
  grid-column: 1 / -1;
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--navy);
}

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--white);
  border: 1px solid var(--grey-border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  transition: border-color var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--navy-light);
  box-shadow: 0 0 0 3px rgba(26,50,96,0.12);
}

.form-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  padding-right: 2.5rem;
}

.form-field textarea {
  min-height: 120px;
  resize: vertical;
}

.form-submit {
  margin-top: var(--space-lg);
}

.form-note {
  font-size: 0.8rem;
  color: var(--grey-text);
  margin-top: var(--space-sm);
  line-height: 1.5;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--navy);
  border-top: 1px solid rgba(201,168,76,0.2);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand__logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  display: block;
  margin-bottom: var(--space-md);
}

.footer-brand__logo span {
  color: var(--gold);
}

.footer-brand p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.65;
  margin: 0;
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: var(--space-md);
  display: block;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col ul a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color var(--duration);
}

.footer-col ul a:hover {
  color: var(--gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--space-xl);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.footer-bottom__copy {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

.footer-disclaimer {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
  max-width: 560px;
  line-height: 1.6;
  font-style: italic;
}

/* ============================================================
   DIVIDER
   ============================================================ */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--grey-border), transparent);
  border: none;
  margin: 0;
}

.divider--gold {
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.35;
}

/* ============================================================
   HIGHLIGHT BAND
   ============================================================ */
.highlight-band {
  background: var(--gold);
  padding: 0.6rem 0;
  text-align: center;
}

.highlight-band p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--navy);
  font-weight: 500;
  margin: 0;
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */
@media (max-width: 1024px) {
  .content-layout {
    grid-template-columns: 1fr;
  }

  .content-sidebar {
    position: static;
    order: -1;
  }

  .toc {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    align-items: flex-start;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --space-4xl: 3.5rem;
    --space-5xl: 4.5rem;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--navy);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-md);
    border-bottom: 1px solid rgba(201,168,76,0.2);
    z-index: 99;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: rgba(255,255,255,0.05);
    border: none;
    border-radius: 0;
    padding: 0.25rem 0 0.25rem 1rem;
    margin-top: 0.25rem;
  }

  .grid-2,
  .grid-3,
  .grid-auto {
    grid-template-columns: 1fr;
  }

  .aos-grid {
    grid-template-columns: 1fr;
  }

  .aos-vial {
    border-right: none;
    border-bottom: 1px solid rgba(201,168,76,0.2);
  }

  .aos-vial:last-child {
    border-bottom: none;
  }

  .practitioner-bar {
    flex-direction: column;
  }

  .page-cta {
    flex-direction: column;
  }

  .page-cta__actions {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .stats-row {
    gap: var(--space-md);
  }

  .container {
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .hero {
    padding: var(--space-3xl) 0;
  }

  .section {
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-3xl);
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
  .site-nav, .site-footer, .nav-toggle { display: none; }
  body { font-size: 12pt; }
  h1 { font-size: 22pt; }
  h2 { font-size: 16pt; }
  .hero { background: none; color: black; }
  a { color: black; }
}

/* ============================================================
   ACCESSIBILITY
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}